***QUICK NOTES ABOUT HDEV VIDEO***
Black Image = International Space Station (ISS) is on the night side of the Earth.
Gray Image = Switching between cameras, or communications with the ISS is not available.
No Audio = Normal. There is no audio on purpose. Add your own soundtrack.
For a display of the real time ISS location plus the HDEV imagery, visit here: http://eol.jsc.nasa.gov/HDEV/